Landing is a common movement task used in investigating impact attenuation and mechanisms of impact related lower extremities injury [1-5]. In the literature, there is limited biomechanical information regarding the relationship between eccentric strength of lower extremities and impact related biomechanics in landing. It is still unclear what roles of lower extremity eccentric strength plays i...

This paper presents a novel solution for micro aerial vehicles (MAVs) to autonomously search for and land on an arbitrary landing site using realtime monocular vision. The autonomous MAV is provided with only one single reference image of the landing site with an unknown size before initiating this task. We extend a well-known monocular visual SLAM algorithm that enables autonomous navigation o...

Available behaviors are determined by the fit between features of the individual and reciprocal features of the environment. Beyond some critical boundary certain behaviors become impossible causing sudden transitions from one movement pattern to another. Parkour athletes have developed multiple movement patterns to deal with their momentum during landing. We were interested in whether drop dis...

PURPOSE To investigate the co-contraction of ankle muscles in older subjects with and without a history of falls during a stepping down activity, and whether the co-contraction was disrupted by a concurrent cognitive task. METHOD Ten fallers and 9 non-fallers (mean age = 72.0 +/- 5.0 and 72.1 +/- 7.3 years, respectively) were recruited. Electromyography (EMG) of the tibialis anterior (TA) and...

CONTEXT Fatigue has been shown to disrupt dynamic stability in healthy volunteers. It is not known if wearing prophylactic ankle supports can improve dynamic stability in fatigued athletes. OBJECTIVE To determine the type of ankle brace that may be more effective at providing dynamic stability after a jump-landing task during normal and fatigued conditions. DESIGN Two separate repeated-meas...

BACKGROUND Although it is well known that quadriceps force generates anterior tibial force, it has been unclear whether quadriceps force causes great anterior tibial force during the early phase of a landing task. The purpose of the present study was to examine whether the quadriceps force induced great anterior tibial force during the early phase of a landing task. METHODS Fourteen young, he...